Quid Explosion-Probatur Level? 4 Mean

Explosio-probationis designatio exdllct4:

Temperature gradu IEC/EN/GB3836	Superficies alta T machinae [℃]	Temperatura ignis substantiarum combustibilis [℃]	Combustible substantiae
T1	450	T>450	46 types hydrogenii, acrylonitrile, etc
T2	300	450≥T>300	47 genera acetylene, ethylene, etc
T3	200	300≥T>200	36 genera gasoline, butyraldehyde, etc
T4	135	200≥T>135
T5	100	135≥T>100	Carbon disulfide
T6	85	100≥T>85	Ethyl nitrate

Ex significat explosionem probationem;

d insigne flameproof genus;

IIC indicat tuto intervallo minor 0.5 mm et vena infra 0.45A;

T4 significat temperatus classificationem CREPITUS-probationem electrica apparatu, denotans quod superficies temperatura armorum explosionis probationis non excedat 135°C.